code: def _get_atomic_num(symbol):
      return SYMBOL_TO_NUM[symbol.lower().capitalize()]
  
imports: import ast
  import sys
  import joblib
  import networkx
  import numpy
  import pandas
  import scipy.sparse
  from spektral.data.graph import Graph
label_desc: Use image node_id 13 for calling a global function with example usage: _get_atomic_num(symbol) and returns: SYMBOL_TO_NUM